Classify each of the following data types as discrete, continuous, categorical, or ordinal.
a. Monthly sales revenue
b. Weight of packages shipped
c. Hair or eye color
d. Customer satisfaction rating with choices of Extremely satisfied, Satisfied, Neutral, Somewhat dissatisfied, and Extremely dissatisfied
e. Number of computers in each department
f. Education level
g. Freezer temperature
h. Gender
i. Number of retail shops in a city
j. Units sold in each quarter